Fanfiction.net - This website has a large variety of different fanfictions, not only to InuYasha, but to many other great anime series' as well! I took a look at a few of these fanfictions, and they are all great! Each fanfiction lets you know what it is rated, what language it is in, what type of fanfiction it is (ex: romantic, horror, comedy), and how many words there are in each writing piece. This website is very reliable and will give you a good taste. Just click the link to the left and you will be directed to the fanfiction for Miroku and Sango. Enjoy your reading!
Asianfanfics.com - Another website that has a large variety of different fanfictions. This website is a little bit harder to find things you are looking for, but they do have some InuYasha works. If you are looking for great stories, here is a good place to go. Just be prepared to do a little bit of digging around! Who knows, maybe you'll find another set of fanfictions you'll love on the way. Enjoy your reading!
Inuyasha-fanfiction.com - This website dedicated fully to all different types of fan fiction in the InuYasha community. It's a great place to go to read about your favorite characters. I definitely would recommend giving this site a peak!